ISO 17025 National Accreditation Board for Testing and Calibration

ISO 17025 National Accreditation Board for Testing and Calibration [NABL] is the equivalent of ISO 9000 for calibration and testing laboratories. It applies to any organization that wants to assure its customers of precision, accuracy and repeatability of results. This includes in-house laboratories for which assurance of results is at a premium.


The growth in use of quality systems generally has increased the need to ensure that laboratories that form part of larger organizations or offer other services can operate to a quality system that is seen as compliant with ISO 9000 as well as with ISO 17025. Testing and calibration labs that comply with this standard will also operate in accordance with ISO 9000. Certification to ISO 9000 alone does not demonstrate the competence of the lab to produce technically valid data and results, whereas certification to ISO 17025 does provide that evidence.


ISO/IEC 17025 is a recently introduced standard from the International Organization for Standardization and the International Electro technical Commission. "ISO17025", as it has become known, replaces a number of older standards and guides including ISO/IEC Guide 25, EN45001 and ANSI/NCSL-Z540.


It is a global standard for the technical competence of calibration and testing laboratories. In addition to establishing quality system, documentation and personnel requirements, it directs calibration labs to:


  • Analyze the uncertainty of each measurement
  • Incorporate the uncertainty into the test procedure and/or test limits
  • Provide the uncertainties with the calibration certificate and results
  • Benefits of ISO 13485 QMS Certification:

    • Provides additional information about the quality of each measurement made during the calibration / testing process
    • Enables assessment of relative quality and capability of different calibration / testing laboratories
    • Enables easy comparison of measurement expertise from different calibration suppliers
    • Enables easy comparison of suppliers in different countries
    • Eliminates the need for supplier auditing - calibration suppliers independently verified through the accreditation process